Piston-ring.



E. H, OBERTOP l PISTON RING.

APPLxCATIoN FILED MAY lo, |915.

EARL H. 'OBERTOR GOLDIELD, lilililVADA,4 .ASSIGNORl T0 ROBERT STERLING, OF

' GOLDFIELD, NEVADA.

rIsTolsr-lmve.`

T 0 all @L1/'1,0m it may concern Be it known that I, EARL H. OEaToP,

-a citizen of the United States, residing at Aand other machines which are provided with pistons reciprocating in cylinders.

It is an object of this invention to provide an expansible metallic packing ring which will provide' a tight fit between the -cylinder and ring, thereby preventing leakage.

It is an object of this invention to provide another expansible packing ring which will accommodate itself to a cylinder whose wall is not perfectly vcircular ir/cross section.

It is a furtherobject of '"j's invention to .provide an expansible metall-lc'kf'acking ring which, due to its construction, 1s easily put into place without straining the parts as 1s unavoidable in the case of a one-piece split ring. y

I accomplish these objects by means of the embodiment of my invention disclosed in the accompanying drawing, in which:

Figure l is a vertical section through a cylinder, showing in elevation a piston equipped with my rings. Fig. -2 is a section on the line 2-2 of Fig. l, illustrating the ring disposed in a cylinder whose walls are not concentric. Figa is a perspective View of a ring. Fig. 4 is an enlarged fragmentary vertical section taken on the line 4-4 of Fig. 2.

More specifically, 5 indicates an engine cylinder of the usual construction and of a type common in gas engines, 6 a piston disosed therein provided with packing rinesl gend 8, and the usual piston rod 9. T e rings are disposed in peripheral grooves 10 on the surface of the iston. Each ring consists of .a fiat circular spring lmember 11 which expands the segmental rings mounted upon it. A rigid segmental ringvis disposed Specification oi' Letters Patent.

Patenten api. 11, 1ere.

Application led May 10, 1915. Serial No. 26,924.

upon the spring 11 and consists, as shown, of two halves 12 and 13 'with spaces 14 and 15 between the ends of thesegments, thereby permitting expansion and contraction of the ring. The rigid ring isv rabbeted at a peripheral edge in said rabbet is a resilient segmental ring comprised of two parts 1T and 18 having spaces 19 and 20 between the segments al lowing for expansion.

as indicated at 16 and disposed In assembling the ring spaces 19 and 20 are disposed in staggered relation'to spaces 14 and 15 thereby providing a construction in which the space in each segmental ring caused by expansion is covered by the other segmental ring overlapping it next to the cylinder wall, thereby preventing all leak or escape of the operating Huid. f

Y It will he noted that the ring can be easily assembled and will be held in its assembled position b v virtue of its peculiar structure. The spring ring 11 tends to force the7seg mental ring portions 12 and 13 outward, while the resilient segmental 'ring members 17 and 18 tend to hold the ring together.

In expansible rings as now constructed the ring does not conform to the shape of a cylinder which is not perfectly round in section, touching only at one or two points if the section of the cylinder is oval, or'has worn unevenly at one or more points. My ring is so constructed that the outside or smaller ring is resilient or elastic enoughto expand and vaccommodate itself to any Wear in the cylinder, whether itis worn simply larger-and remains perfectly circular in secring is 'foroecl over the piston it is distorted lne to the Strain Iplaced upon it and will not thereafter fit the cylinder properly.

@What l claim isz' A piston. ring', comprising :1 circular-split spring, n ring comprisod of two like rigid segniorits aamnlarly rabloeted at one peripheral edge disposed about said spring, and a ring oomprised o two like resilient segments disposed Yin the rabbet of vsaid rigid ring With l0 the spaces between its segmentsbstaggered with respect to the spaces between the seg ments of Said rigid'ring.

In witness that l claim the foregoing l have hereunto subscribed my name this 30th l5 (lay of April, 1915.

EARL H. OBERTO?. 

